Model Number: HX-811-1-#2492 Brand Name: OEM Key Specifications/Special Features: Transparent acoustic tube style surveillance earphone received superior sound even in noisy environment, and it’s also discreet and portableChangeable acoustic tube assembly for hygiene and multiple usersClip can secure to user’s lapel to meet their need360 degree revolving back clip can turned by different segments to secure to the user's lapel or collarBeige color cable

Speaker:

• OD: Φ16mm
• Resistance: 90 ohms±15%
• Sound pressure level: 90dB±3dB
• Rated power: 100mW
• Max power: 20mW

Microphone:

• Type: Electret microphone
• Sensitivity: -40dB±3dB at 1000Hz
• Resistance: 2.2KOhm